Cutting Tool Blade with 210-270 Degree Exterior Angle
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Solution Overview
Problem
Conventional cutting tools experience wear and tear, leading to substandard cuts and reduced performance over time due to damaged blades.
Innovation Solution
A cutting tool with a blade portion featuring a knife edge defined by a grind surface and intersecting chamfer surfaces, providing enhanced durability and cutting efficiency through specific geometric configurations, including exterior surface angles and spine sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional cutting blade is used, then the tool can perform cutting operations, but the blade experiences wear and tear leading to reduced durability and performance
Solution Approach 1:
The patent applies parameter changes by optimizing the exterior surface angles of the blade surfaces. Specifically, the grind surface is configured with an exterior surface angle between 210-270 degrees relative to the chamfer surface, and the second grind surface has an angle between 300-345 degrees. These precise angular parameters enhance the blade's resistance to chipping and breakage while maintaining cutting efficiency, directly addressing the durability and reliability contradiction
Solution Approach 2:
The blade portion is constructed from composite materials, specifically combining hardened steel or ceramic materials that provide both strength and wear resistance. This composite construction allows the blade to maintain its geometric integrity under repeated cutting loads, preventing the wear and tear that would otherwise degrade cutting performance consistency
2Strength
If the blade is made more durable through specific geometries, then resistance to chipping and breakage improves, but the complexity of manufacturing increases
Solution Approach 1:
While the specific angular parameters (210-270 degrees for the first exterior surface angle, 300-345 degrees for the second) do increase manufacturing precision requirements, they can be achieved through standardized grinding processes. The consistent geometric relationships between surfaces allow for programmed grinding operations that, while precise, follow repeatable patterns rather than requiring complex custom tooling for each blade
Solution Approach 2:
The blade geometry is segmented into distinct functional surfaces (chamfer surface, first grind surface, second grind surface) with clearly defined angular relationships. This segmentation allows each surface to be ground and finished independently using standard abrasive processes, making the complex geometry manufacturable through sequential operations rather than requiring monolithic forming
Data Source
AI summary
A cutting tool may comprise a blade portion forming a distal end of the cutting tool. The blade portion may comprise a knife edge, and this knife edge may be defined by a grind surface. The blade portion may further include a chamfer surface that intersects the grind surface. The grind surface may be planar and/or the chamfer surface may be planar. A first exterior surface angle, defined as an external angle between respective outwardly facing surfaces of the grind surface and the chamfer surface, may be between about 210 degrees and about 270 degrees.